Closing device for containers made of aluminum or other soft metals



Nov. 19, 1929. s. H. LARSEN CLOSING DEVICE FOR CONTAINERS IvLADE OF ALUMINUM OR OTHER SOFT METALS Filed Oct. 25, 1925 2 Sheets-Sheet 1 1929- s. H. LARSEN 1,736,350

CLOSING DEVICE FOR CONTAINERS MADE OF ALUMINUM ORNOTHER SOFT METALS Filed Oct. 25, 1926 2 Shoots-Sheet 2 J. flo wnsen mven+ow Patented. Nov. 19, 1929 UNITED STATES PATENT orrlcr.

SVEN'D EEG LABSEN, O Il? FBEDERIKSBERG, NEAR COPENHAGEN DENIARK, ASSIGN'OR 'IEO AKTIESELSKABT '3 DE FOBENEDE BRYGGERIEB, OI COPENHAGEN, DENMARK CLOSING DEVICE FOR CONTAINER-8 MADE OF ALUMINUK- DR OT IJER SOFT META I ls Application filed October 25, 1926, Serial No.

duced when the two difierent'and heterogeneous metals come in contact with each other, such action causing corrosion of one of the metals.

The invention has for its object to avoid the said corrosion of one of the two metals, and consists in a special tightening lid for containers of the said nature, more es ecially beer containers, the metal parts of t e said lid being so dimensioned that they, when the lid is in its tightened condition, will have no electric connection with the container. The lid may suitably be of that kind in which a packing ring or the like is pressed against the container by a top part and a bottom part, and the said two parts are then made with a diameter which differs essentially from that of the corresponding container. The container may, in order to secure the position of the lid, be provided with a groove into which the packing rin is pressed, the said groove being so adapte that the bottom part of the lid is moved out of touch with the container during tightening operations The invention is illustrated in the accompanying drawings, viz:

Fig. 1 shows, in vertical section,-a constructional form of a ti htening lid according to the invention, fitted to a beer container,

Fig. 2 shows t-he same constructional form, as seen from above, and

Fig. 3 shows, on a reduced scale, theti'ghtening lid in connection with the mechanism for breaching the cask or'container.

The lid consists of a top part and a bottom part, both of essentially smaller diameter than the surrounding part-of the container to ensure that they do not touch the container.

The top part has essentially the formof a so disc a, perforated in the middle, while the 144,078, and in Denmark February 26, 1828 bottom part is formed essentially as a sort of plug 0 which projects upwards through the top part and is provided with a flange or collar b, at the same time being threaded to receive a nut d by means of which the actual tightening operations are done. The edges of the disc a and the flange b are so curved or shaped that two conical surfaces appear. A packing rin e, made for instance of caoutchouc, is p aced between these surfaces, and during tightening operations this ring is pressed into a groove f provided in the edge 9 of the container h. The said groove is circular in section, corresponding to the section of the packing ring. The shown arrangement of the symmetrical and conical surfaces causes a good fit between ring 0 and groove f, and this, again, secures the lid in its proper position.

It will be seen in the drawing thatwhen the lid is tightened the two parts of the lid will not touch the container at any point, whereby the above mentioned electrolytic action is completely avoided.

In order to allow the cask or container to p tube by means of the handle it may be screwed down 1nto the plug a. The tube '1' is provided with a branch Z through which carbon dioxide may be admitted under ressure, the branch pipebeing provided wit a pressure gauge m, safety valve 42 and stop cock 3 The breaching ipe t proper is placed inside the tube 1', the roachmg pipe moving in a packing provided at the top of the tube 1-; the. hand wheel 0 serves to secure the ipe t in the desired position. At the top t e pipe 13 is provided with a sto cock 2 and threads for connection to the eer outlet cook. The, broaching, which must be done in such a man- 2 messes ner that it is possible to remove a larger or smaller quantity oi beer from the can er without any atmospheric air being admitted to the container, is performed in this way 3 that the tube r is first screwed into the 1plug 0, whereby the stopper k is moved some ttle distance downwards; after this the ipet is moved downwards so that it carries e stopr is out of the plug 0. The pipe t is moved 1o ownwards almost to the bottom of the container and the hand wheel is tightened. When carbon dioxide under pressure is now admitted through the branch pipe I and the tube 01 it willgpress the beer upwards through the ipe t, an when the stop cock 2 is opened the esired quantity of beer may be drawn ofi.

As long as there is any beer in the container the lid (parts a toe) remains in position in the container as above described, wellgo tightened; and the container will thus be continually shut off from the outer air.

It should be noted that the invention is not restricted to the constructional form described and illustrated in-the accompanyin :5 drawing; it may be performed in various di ferent ways without deviating from the principlles of the invention. a

claim: a

A device of the character described includso ing in combination, a containing body of soft metal havin a neck provided with an annular shoulder an with an annular groove situated slightly above the shoulder, the bottom of the groove being transversely curved an adjustas able clamping lid of hard metal mcludin a central fpluig, top and bottom flared disc hke parts 0 a iameter greater than the diameter of theshoulder and less than the diameter of the mouth of the body so that when in an untightened condition the lid rests on the shou der, the bottom disc part being rigid with the plug and the upper disc part bemg aperture and movable on the plug, a packing ringx circular in cross section situated between t e flared portions of the top and bottom disc-like parts, and a clamping element adjustably engaged with the upper ro'ecting portion of the plu for drawm the disclike parts toward eac otherso t at owin to the loose mounting of the upper part an the circular cross-sectional shape of the ring the latter moves upwardly and outwardly into engagement with the groove thereby raising the lower disc-like part out of contact with the shoulder to avoid corrosion of one of the metals as a conse uence of electrolytic action.

In testimony w ereof I aflix my signature.

. SVEND HQEG LAB SEN. 

